package xyz.bernkastel.goods_in_great_demand.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import xyz.bernkastel.goods_in_great_demand.common.BaseContext;
import xyz.bernkastel.goods_in_great_demand.common.CustomException;
import xyz.bernkastel.goods_in_great_demand.entity.*;
import xyz.bernkastel.goods_in_great_demand.mapper.OrderMapper;
import xyz.bernkastel.goods_in_great_demand.service.*;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     *
     * @param orders
     */
    @Transactional
    @Override
    public void submit(Orders orders) {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        //获取购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> cartList = shoppingCartService.list(queryWrapper);

        if (cartList == null || cartList.size() == 0) {
            throw new CustomException("购物车为空");
        }

        User user = userService.getById(userId);
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());

        if (addressBook == null) {
            throw new CustomException("地址信息有误");
        }

        long orderId = IdWorker.getId();//订单号

        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> details = cartList.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setGoodsTag(item.getGoodsTag());
            orderDetail.setGoodsId(item.getGoodsId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //将数据插入order和order_detail插入数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName() +
                (addressBook.getCityName() == null ? "" : addressBook.getCityName()) +
                (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName()) +
                (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        this.save(orders);
        //清空购物车数据
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(details);

        //清空购物车数据
        shoppingCartService.remove(queryWrapper);

    }
}
